spring boot 之登录拦截

@Configuration
public class WebSecurityConfig  extends WebMvcConfigurerAdapter {
    @Autowired
    private  RedisTemplate redisTemplate;
    private RedisTemplate userredis(RedisTemplate redisTemplate) {
        redisTemplate = RedisDbInit.initRedis(RedisConfig.userreidport, redisTemplate);
        return redisTemplate;
    }
    @Bean
    public SecurityInterceptor getSecurityInterceptor() {
        return new SecurityInterceptor();
    }

    public void addInterceptors(InterceptorRegistry registry) {
        InterceptorRegistration addInterceptor = registry.addInterceptor(getSecurityInterceptor());

        addInterceptor.excludePathPatterns("/error");
        addInterceptor.excludePathPatterns("/plan/login**");
        addInterceptor.addPathPatterns("/web/**");
    }

    private class SecurityInterceptor extends HandlerInterceptorAdapter {

        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
                throws Exception {
            String url = "/plan/logins";
            HttpSession session = request.getSession();
            if (session.getAttribute("username") != null){
                String name= (String) userredis(redisTemplate).opsForValue().get(session.getAttribute("username"));
                if (name==null){
                    response.sendRedirect(url);
                    return false;
                }else {
                    return true;
                }
            }
            response.sendRedirect(url);
            return false;
        }
    }
}